Do the lines start buckling with 47 degree C, temps and 1.8 km long double stacked trains?
Does the ARTC halt operations to cooler hours?
I'm a Port Augusta based driver that works Adelaide to Berrimah. Trains have been running generally to schedule or better over the recent hot spells.Drive to the conditions, love it. My ar$e is covered.
No special restrictions have been put in place recently due to extreme heat, although a Train Controllers 'get out of jail free card' is to advise drivers to 'drive to the conditions'.
The last significant heat buckle I recall was on the Seaford line at Clarence Park on the up side about 4 years ago.=You might be thinking of this photo?
I'm not an expert, but rail stress free temperature in SA is about 36 degrees. It varies a bit around the place, but its generally in that vicinity throughout Australia.The track gangers I chatted with a few months back said the happy track temperature in Queensland Metro area is 38 C.
When rail is installed or repairs made, the rail temperature is measured and stress in installed in the track by pulling it, or allowing it to cool to allow for expected operating temperature range.
Lots of other variables in track buckles other than rail stress. For example, Rail joint type Continuously Welded Rail vs plated track, sleeper type/condition, Fastening type/condition, ballast condition/shoulder compaction.
I trust this is of interest.
Channel 10 news, Sydney sHowled footage last night of fire brigade hosing the line around Mittigong due to heat. Appeared to be down main as what I think was the up empty garbage train with two 81,s on point passed by headed to Sydney. Curiously it was moving at a fair clip.In Melbourne on a flyover there is a sprinkler system that sprays water onto the web of the rail.